2455 Old Penitentiary Road

Boise, ID 83712 (Next to the Old Pen)

Current Hours

IMMG has now closed for the Season. Check back in Spring for the latest plan to open for 2021.

Free Admission!

Tours and other programs available.

About Us

Mission of IMMG is to promote education and understanding of the importance of mining & geologic sciences to the development of Idaho. The Museum will access, develop, and maintain exhibits, collections, and activities pertaining to mining & geology in the Idaho region. IMMG will maintain geologic expertise, knowledge of the mining industry in the State, and a vigorous set of education & outreach programs to citizens & visitors of Idaho.

  • 2455 Old Penitentiary Road
    Boise, ID 83712
  • 208-368-9876
  • Currently Closed for the Season. Re-opening Spring 2021.
  • OPEN Seasonally

Our History

The Idaho Museum of Mining and Geology (IMMG) was founded as a non-profit in 1989 and opened in the Trusty Dorm at the Old Idaho State Penitentiary in 1994. Since then, we have shared Idaho mining stories and given visitors a peek into the fascinating study of earth sciences with an emphasis on Idaho geology. The museum includes a historic mining camp, lode and placer mining equipment, a microscope station, rocks and minerals from Idaho, fluorescent minerals, meteorites, fossils, and a seismograph!